through a direct coupling between the electric field \( {\bf E}\)  and the auxiliary field \( {\bf H} \)  by chirality parameter \( \kappa \) .
Here, \(\varepsilon \)  and \(\mu \)  are the relative permittivity and relative permeability of the medium, respectively. The constant \(\kappa \)  characterizes the nature of media and usually satisfies the condition \(\kappa \ll \sqrt{\varepsilon \mu }\) .
By using the aforementioned constitutive relations in the Maxwell equations [1]}, one can derive the insightful information such that the each circular polarization field propagates with different phase velocity and wave vectors that explicitly depends on chiral parameter \(\kappa \) . The wave vectors inside the chiral media can be written as \(k_{s,\sigma }=k_{0}(\sqrt{\epsilon _{s}}+\sigma \kappa )\) , where \(k_{0}= 2\pi c/\lambda _0\)  the vacuum wave vector, \(\sigma = 1 (-1)\)  for left (right) circularly polarized plane wave.
